Means for preventing creeping of meters.



No. 696,459. Patented-Apr. I, I802.

A. n. LUNT. MEANS FOR PREVENTING CREEPING 0F METERS.

(Application filed Oct. 23, 1901.)

(N0 Model.)

WiCnesses. Inventor Alexander 13. LuncQ M v by m: NORRI'S min on PHOTOLITNQ. WASHINGTON, a, c.

Nrrnn ATENT l l lCE;

ALEXANDER D. LUNT, OF SOI-IENEOTADY, NEW YORK, ASSIGNOR TO GEN- ERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

MEANS FOR PREVENTING CREEPING OF METERS.

SPECIFICATION forming part of Letters Patent No. 696,459, dated April 1, 1902. Application filed OctoherZS, 1901. Serial No. 79,679- (No model.

To ctZZ 1077,0122 it may concern: by dotted lines at 5. The usual drag-magnet Be it known that I, ALEXANDER D. LUNT, acting upon the disk is indicated at 0. a citizen of the United States, residing at The meter so far described is intended Schenectady, county of Schenectady, State of merely asjtypical of any well-known alternat- NewYork,have invented certain new and use ing-current meter.

ful Improvements in Means for Preventing Theinvention is applied to the meter in this OreepingofElectric Meters, (Case No. 2,502,) particular instance by attaching to the disk of which the following is a specification. 1 a small piece of copper or other good con- My present invention is intended to preducting material 7, this piece being located to ventthe creepingof electric meters, and while so that by rotation of the disk it is brought more especially designed for use in connecperiodically through the field due to the tion with alternating-current meters is not, shunt-winding 2. To preventmechanical unhowever, necessarily limited to use in that rebalancing of the rotating element of the melation only. ter, another similar piece of metal 8 may be if; In carrying my invention into practice the attached to the disk 1 in such a position as to induced member of the meter is locally thickmechanically balance the piece 7. ened in such a way that rotation of the mem- In explaining the operation of the antiber brings the thickened portion periodically creeping device it will be suiiicient to point through the alternating field of the meter. out the fact that as one of the pieces of metal 26 The currents induced in the thickened por- 7 S is caused to approach the field of the tion react upon the magnetic field to which shunt-coil, due to creeping or other causes, they are due and produce a repulsion which induced currents are set up therein, which opposes the passage of said thickened portion produce a repulsion between the piece of through the field. Bysuitable adjustment or metal and the field. By suitably proportion- 2'5 proportioning of parts this repulsion effect ing the size of the piece 7, as well as its come may be made just sufficient to overcome any panion 8, this repulsion effect may be made creeping tendency which may exist. just sufficient to overcome the creeping tend- For a better understanding of my invenency of the meter. The propersize and adj usttion and its mode of application reference is ment of these pieces of metal having been 30 to be had to the following description, taken found, they may be secured to the disk 1 in So in connection with the accompanying drawany convenient manner as, for example, by ings, which represent one embodiment of my the use of some adhesive cement, by solderinvention. The features of novelty which ing or other metallic connection, or by any characterize my inventionlhave pointed out other convenient means. To readjust the 35 in the appended claims. anticreeping device, as may be rendered nec- I have found that the purpose of my inessary upon change ofconditions in the operavention may be effected in practice by attion of the meter, it is only necessary to detaching to the induced member of an inductach the pieces of metal which constitute the tion-meter a small piece of non-magnetic anticreeping device and replace them by 40 metal in such location that it may periodically pieces of metal either larger or smaller, as

pass into and out of the alternating magnetic may be necessary.

field of the meter. What I claim as new, and desire to secure The drawing illustrates an arrangement by Letters Patent of the United States, is embodying this device. 1. In an electric meter, the combination 45 At 1 is indicated the disk of an inductionwith the rotating member, of an anticreeping 5 meter, upon which acts the shunt-field due device consisting of a piece of non-magnetic t0 the shunt-winding 2 and its core 8. The metal or other conductor superposed thereon. series coils which cooperate with this shunt- 2. In an induction-meter, the combination field are in this case represented as being with the induced member, of an anticreeping 50 mounted beneath the disk and are indicated device consisting of a small piece of copper Ioo or other good conducting non-magnetic metal superposed thereon.

3. In aninduction-meter, an induced member having a locally-thickened portion of nonmagnetic material arranged to pass periodically through the field of the meter as the induced member rotates.

4. The combination with the rotating member of an alternating-cu rrent induction-meter, of a locally-superposed piece of non-magnetic metal.

5. In an electric meter, the combination with the rotating member, of a plurality of pieces of metal or other good conducting ma- 

